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Observation of spin dependent photocoductivity in InSb quantum well nanowires

Li, J, Litvinenko, KL, Clowes, SK, Gilbertson, AM and Cohen, LF (2012) Observation of spin dependent photocoductivity in InSb quantum well nanowires Applied Physics Letters, 101 (15). ISSN 0003-6951

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Abstract

We report on the electrical detection of spin dependent photoconductivity in 500 nm wide InSb quantum well nanowires using the optical orientation of electron spins. By applying weak magnetic fields (≈ 200 mT), we observe a spin filtering effect of classical origin caused by spin dependent back scattering of electrons from the sidewalls. Spin dependent features in the longitudinal photovoltage decay with temperature and disappears at characteristic energy (≈ 50 K) consistent with the theoretical spin splitting and the thermal level broadening. We show that the observed signal is due to the inversion asymmetry of the quantum well, with an additional Zeeman contribution. © 2012 American Institute of Physics.

Item Type: Article
Additional Information: Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters, 101 (15) and may be found at http://dx.doi.org/10.1063/1.4760223.
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Symplectic Elements
Date Deposited: 30 Nov 2012 12:09
Last Modified: 23 Sep 2013 19:50
URI: http://epubs.surrey.ac.uk/id/eprint/735787

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